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'(NoModeL) G. R. GULLINGWORTH.

ROCK DRILL TRIPOD.

No. 327,923. Patented Oct. 6, 1885 e i if N. PETERS. Phm-uiw u mr,Wuhmmon. D. a

UNITED STATES PATENT OFEIcE.

GEORGE E. CULLINGVVOBTH, OF NE\V YORK, N. Y.

ROCK-DRILL TRIPOD.

SPECIFICATION forming part of Letters Patent No. 327,923, dated October6,1885.

Application filed January 26, 1885 Serial No. 153,951.

To all whom it may concern.-

Be it known that I, GEORGE E. OULLING- WORTH, of the city and county ofNew York, in the State of New York, have invented a new and usefulImprovement in Rock-Drill Tripods, of which the following is aspecification.

My invention is applicable to rock-drills working with steam or air, andan important object of my invention is to provide a tripod of light andsimple construction in which there are but few parts, any one of whichmay be renewed at small cost in case of breakage.

The cylinder and other parts may be of any ordinary or suitableconstruction. The tripod is principally composed of two parallel barshaving on the inner sides guides for the cylinder, and connected at thelower ends by a divided ring or bracecomposed of two sections formedintegrally, one with each bar, and bolted together. Each section of thering or brace has a foot adjustably connected with it in a novel manner,hereinafter described, and the two parallel bars are connected at theirupper ends by a cross brace or sleeve interposed between them andsecured by a bolt passing through the cross-brace and bars. Thiscross-brace has formed in it a bearing for the usual feed orcylinder-adjusting screw. I also employ a back leg, the upper end ofwhich is forked to embrace the two parallel bars and their interposedcross brace or sleeve, and is secured by the same bolt which joins thesaid parallel bars and cross brace or sleeve.

in the accompanying drawings, Figure 1 is a 'de elevation of a tripodembodying my invention. Fig. 2 is a rear elevation thereof, the back legbeing broken away. Fig. 3 is a plan of the back leg, the upper ends ofthe parallel bars and their cross-brace. Fig. 4 is atransverse sectionon the dotted line a: m, Fig. 2, and Fig. 5 is a sectional detail viewillustrating the means for securing the feet adj ustably in place.

Similar letters of reference designate corresponding parts in all thefigures.

A designates the drill-cylinder, which,with its appurtenances, may be ofany suitable construction.

B B designate two parallel bars, which di Verge slightly at their lowerends, and are of (No model.)

cast metal. They have on their inner sides guides or slideways a, towhich the cylinder is fitted, and along which it may be adjusted by afeed-screw, 0, having a handle, I), at the upper end.

Between the upper ends of the bars B is interposed a cross brace orsleeve, D, which is there secured by a bolt, a, passing through thebrace or sleeve and bars B, and also through the ends of a fork, E,which embraces the bars B, and is at the upper end of a back leg, E.

To prevent the sleeve from turning, it and the bars B are lockedtogether by tongues and grooves d d, as shown in Fig. 3, and to abearing, D, on the brace or sleeve D is fitted the screw 0. The lowerends of the bars B are connected by a lateral brace, here shown as madenearly in the form of a circle an d---- composed of two sections B, castwith the two bars, each section being integral with a bar. At themeeting ends of the bracesections B are lugs or ears e, through whichare inserted bolts 6, for screwing the sections to gether.

The back leg, E, is provided with an adjustable foot, f, which may besecured in place by a set-screw, f and on each bracesection B, issecured a foot, f ,as best shown in Fig. 5, but also shown in the otherfigures.

On each brace-section B is cast an inclined lug or ear, 9, and throughthis lug or car is inserted a post, h, having at one end a head, 71 andin the other end a set-screw, h This post is slotted to receive the footthrough it, as shown in Fig. 5, and this slot if extends within the lugnear 9. The foot is slipped into the slot h, and the screw being set upagainst the foot, the latter is clamped against the face of the lug 9,while the head h of the post is drawn tightly against the back of thelug. In this way the foot is secured adjustably in place, and byloosening the screw the foot will be released, and may he slid to theproper point and again secured by tightening the screw.

WVhat I claim as my invention, and desire to secure by Letters Patent,is-

1. The combination, with the cylinder of a rock drill, of two parallelbars forming guides for the cylinder and connected at their lower endsby a brace composed of two sec- ILO tions cast one with each bar andbolted together, feet upon said brace, and a back leg and foot,substantially as herein described.

2. The combination,with the bars B B, and the annular sectional braceconnecting their lower ends and formed of sections cast with the barsand bolted together, of feet f 2 on said brace, and a back leg and foot,substantially as herein described.

3. The combination, with the parallel bars B,and the sectionalbrace B,formed part with each bar, and bolted together, of the crossbrace orsleeve D,interposed between the upper ends of the bars and comprising abearing for afeed-screw, a back leg forked at the upper end to embracesaid bars, and the bolt 0, passing through the fork, the bars, and theinterposed sleeve or brace, substantially as herein described.

4. The combination, with a rock-drill frame 20 having a lug or ear, 5 ofa post, h, having at the back end a head, h, bearing against the innerside of the lug or car, and also having a transverse slot, 7L3, throughwhich a foot, f, is inserted in front of the lug or ear and a set-screw,7L2, screwed into the outer end of the slotted postand bearing againstthe foot f substantially as herein described,whereby the tightening ofthe screw h will draw the head h tightly against the back of the lug orear and force the foot f 2 tightly against the front of said lug or ear.

e. R. oUL INewoRTH.

Witnesses:

FREDK. HAYNES, LIATTHEW' PoLLocK.

